Erik Jan Hanussen (June 2, 1889 - March 25, 1933) was born Herschel Steinschneider in Austria, was a clairvoyant, mentalist, occultist, and astrologer, active in Nazi Germany. He converted from his family's Jewish faith to Protestant and became a Nazi.

Legends abound about meetings between Hanussen and Adolf Hitler, including a meeting between the two just before the German election, November 1932, during which Hanussen taught Hitler secret crowd control techniques with the utilization of gesture. Ultimately he was executed by the Gestapo and his body was dumped in a field north of Berlin.